20 



blossom huds were well advanced the Bordeaux mixture was used, 

 adding Paris green one pound to 200 gallons, to destroy the tent- 

 eaterpillar, bud moth and canker worm. A second application of the 

 same mixture, with Paris green one pound to 100 gallons, was 

 applied, as soon as the petals had fallen, to destroy the codling moth 

 and a third application of the same two weeks later. 



At intervals of from two to four weeks the Bordeaux mixture alone 

 was applied to prevent the apple scab until August 1st, when one or 

 two applications of the ammoniacal copper carbonate, formula a, was 

 made. 



RESULTS. 



The results of this work, an average from all the trees treated, 

 were as follows : 



Per cent of wormy apples on trees sprayed was .17 



Per cent of wormy apples on trees uusprayed was .82 



Per cent of scabby apples on trees sprayed was .03 



Per cent of scabby apples on trees unsprayed was .51 



RESULTS WITH COPPER SULPHATE SOLUTION. 



There is more or less trouble experienced in the use of the Bor- 

 deaux mixture, by clogging of the pumps or nozzles, unless great care 

 is taken in straining the mixture before it is put into the pumps, and 

 this has led to experiments in the use of the simple solution of cop- 

 per sulphate which makes a clear liquid from which there can be no 

 clogging. It is a well known fact that even as dilute a solution of 

 copper sulphate as one part to 3000 parts of water will destroy the 

 spores of most of the common parasitic fungi, and many trees were 

 treated with this solution in two proportions with the following 



1. Used at a strength of 1 lb. to 500 gallons of water the foliage 

 was seriously injured. 



2 At the rate of 1 lb. to 800 gallons the foliage escaped serious 

 injury. 



3. It was found that Paris green could not be safely used with 

 either of these solutions. 



4. That the codling moth did less injury to the fruit when 

 sprayed with these solutions than when unsprayed. 



